Read Nona through the standard OpenFeature API.

npm install nona-client nona-openfeature-provider @openfeature/server-sdk

import { OpenFeature } from "@openfeature/server-sdk";
import { createNonaOpenFeatureProvider } from "nona-openfeature-provider";

await OpenFeature.setProviderAndWait(
  "nona-production",
  createNonaOpenFeatureProvider({
    baseUrl: "https://nona.example.com",
    apiKey: process.env.NONA_API_KEY,
    environmentId: "production",
  })
);

const client = OpenFeature.getClient("nona-production");
const enabled = await client.getBooleanValue("Features:Checkout", false);

Evaluates asynchronously, per request. Maps config_entry_not_found to FLAG_NOT_FOUND; other HTTP failures remain provider errors.

npm install nona-client nona-openfeature-web-provider @openfeature/web-sdk

import { OpenFeature } from "@openfeature/web-sdk";
import { createNonaOpenFeatureWebProvider } from "nona-openfeature-web-provider";

await OpenFeature.setProviderAndWait(
  createNonaOpenFeatureWebProvider({
    baseUrl: "https://nona.example.com",
    apiKey: "your-frontend-api-key",
    environmentId: "production",
  })
);

const client = OpenFeature.getClient();
// Synchronous — the snapshot is already in memory.
const enabled = client.getBooleanValue("Features:Checkout", false);

Loads the whole frontend-scoped environment as one snapshot, then resolves flags synchronously from memory. Needs a frontend-scoped API key.

dotnet add package Nona.Client
dotnet add package Nona.OpenFeature.Provider

using Nona.Client;
using Nona.OpenFeature.Provider;
using OpenFeature;

using var nona = new NonaClient(new NonaClientOptions
{
    BaseAddress = new Uri("https://nona.example.com"),
    EnvironmentId = "production",
    ApiKey = Environment.GetEnvironmentVariable("NONA_API_KEY")
});

await Api.Instance.SetProviderAsync("nona-production", new NonaOpenFeatureProvider(nona));

var featureClient = Api.Instance.GetClient("nona-production");
var enabled = await featureClient.GetBooleanValueAsync("Features:Checkout", false);

Built on top of a configured NonaClient, so the provider only needs the client instance.